JP2002038809A - Horizontal folding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontal folding door whose lower leaf can also be open by pulling a down edge of the lower leaf this side. SOLUTION: A momentary center C13 of a cabinet 1 of a lower leaf 3 is placed under the lower leaf 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal folding door used for opening and closing a front opening of a frame such as a cabinet.

[0002]

2. Description of the Related Art Generally, a horizontal folding door has two upper and lower doors. The upper door has its upper end pivotally connected to the upper end of the opening of the skeleton. The lower door has its upper end pivotally connected to the lower end of the upper door. Further, a rotation link is arranged between the skeleton and the lower door. One end and the other end of the rotation link are rotatably connected to the frame and the lower door, respectively.

[0003] The upper door and the lower door are arranged vertically in the closed position, and close the opening of the frame. When the lower door is pulled toward the user in this closed state, the upper door and the lower door rotate, respectively, and a mountain-folding state is created so that the connection points of the two doors are separated from the frame. Thereby, the opening of the frame is opened.

[0004]

In the conventional horizontal folding door, the lower door cannot be opened even if the lower end is pulled, and the upper end must be pulled for the reason described later.
For this reason, when a horizontal folding door is used for a cabinet or the like arranged at a high position, there is a problem that the upper end side where the lower door can be opened cannot be reached and the door cannot be opened without using a stepladder or the like. there were.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a horizontal folding door which can be opened by pulling a lower end of a lower door. According to the first invention, an upper door whose upper end is rotatably connected to an upper end of the frame around a horizontal axis is provided, and an upper end is rotatable about a horizontal axis at the lower end of the upper door. And one end is rotatably connected to the skeleton about a horizontal axis, and the other end is located at a position lower than the rotation connection point of the lower door with the upper door. A rotation link connected rotatably about a horizontal axis,
When the upper door and the lower door are closed, they are arranged in a line in the vertical direction to close the front opening of the skeleton, and when opened, the connection points of the skeleton are separated from the skeleton so that they are folded into a mountain and the skeleton is folded. In the horizontal folding door that opens the opening, an instantaneous center of the lower door with respect to the skeleton at the time of closing is disposed below the lower door. Further, the second invention provides an upper door having an upper end rotatably connected to an upper end of the skeleton about a horizontal axis, and a lower end of the upper door turning around an axis having a horizontal axis. The lower door movably connected, one end is rotatably connected to the skeleton about a horizontal axis, and the other end is lower than the rotation connection point of the lower door with the upper door. A pivot link connected rotatably about a horizontal axis at a location, wherein the upper door and the lower door are arranged in a line in the up and down direction when closed, and close the front opening of the skeleton, At the time of opening, in the horizontal folding door which opens in the mountain fold state and opens the opening of the skeleton so that the connecting points are separated from the skeleton, the instantaneous center of the lower door with respect to the skeleton at the time of closing is above the lower door. And the upper door is disposed above the center of rotation of the upper door and the frame. It is set to. In the first and second aspects of the present invention, it is desirable that the instant center be located at infinity. In addition, one end of the arm is rotatably connected about a horizontal axis at a position away from the front side to the back side of the upper end of the frame,
It is preferable that the other end of the arm extending to the front side of the skeleton be fixed to the upper end of the upper door so that the upper end of the upper door is rotatably connected to the upper end of the skeleton.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2
1 shows an embodiment of the first invention. In this embodiment, a horizontal folding door A comprises an upper door 2 and a lower door 3 for opening and closing a front opening of a cabinet (frame) 1, and a cabinet 1. And a biasing mechanism 4 provided between the lower door 3 and the lower door 3.

The upper door 2 is for opening and closing the upper half of the front opening of the cabinet 1, and its upper end is connected to the upper end of the cabinet 1 via a hinge 5 so as to be vertically rotatable. ing. The rotation range of the upper door 2 is set between the closed position shown in FIG. 1 and the open position shown in FIG.

The hinge 5 has a pair of hinge pieces 51 and 52. One hinge piece 51 is fixed to a position on the upper surface of the cabinet 1 away from the front surface to the rear surface. One end of the other hinge piece (arm) 52 is rotatably connected to the hinge piece 51 about a horizontal axis. The other end of the hinge piece 52 extends along the upper surface of the cabinet 1 and bends downward at the front end of the cabinet 1 when the upper door 2 is in the closed position. The upper end of the rear surface of the upper door 2 (the surface facing the cabinet 1) is fixed to an end of the hinge piece 52 extending downward. By interposing the hinge 5 having such a configuration between the cabinet 1 and the upper door 2, the center of rotation of the upper door 2 with respect to the cabinet 1 is arranged at a predetermined distance from the front end of the upper surface of the cabinet 1 to the rear side. ing.

The lower door 3 is rotatably connected at its upper end to a lower end of the upper door 2 via a hinge 6 having a horizontal rotation axis. As shown in FIG. 1, the lower door 3 is arranged below the upper door 2 when closed, and closes the lower half of the opening of the cabinet 1. On the other hand, when opened, the upper end of the lower door 3 follows the upper door 2 and moves in a direction away from the cabinet 1 and rotates with respect to the upper door 2. As a result, upper door 2
The lower door 3 and the lower door 3 are in a mountain-folded state such that their connection points are separated from the cabinet 1. As is clear from this, when the lower door 3 turns from the closed position side to the open position side, the lower door 3 turns clockwise in FIG. Moreover, when the lower door 3 is to be rotated clockwise from the closed position, the upper end surface thereof contacts the lower end surface of the upper door 2. Thereby, the clockwise rotation of the upper door 2 is prevented. The center of rotation of the hinge 6 is located slightly below the middle between the upper door 2 and the lower door 3. This is lower door 3
When the is turned to the open position, the lower end portion is prevented from hitting the front surface of the cabinet 1.

The urging mechanism 4 has a casing 41 and a link 42. The casing 41 is fixed to an inner surface of the cabinet 1. One end of the link 42 is rotatably connected to the casing 41 via a horizontal shaft 43 extending in the left-right direction. The other end of the link 42 is rotatably connected to a lower rear portion of the lower door 3 via a bracket 7 and a horizontal shaft 8 extending in the left-right direction.

The link 42 is moved by a spring (not shown) provided in the casing 41 to move the lower door 3 from the open position in a predetermined rotation range in which the lower door 3 moves from the closed position to the open position. It is urged to rotate toward the closed position. The lower door 3 and the upper door 2 are maintained in the closed position by this rotational urging force. When the lower door 3 turns to the open position beyond the predetermined turning range, the link 42 is urged to turn in a direction to move the lower door 3 from the closed position to the open position. Thereby, the lower door 3 and the upper door 2 can be opened lightly. The link 42 and the casing 4
1, a damper mechanism (not shown) is provided to prevent the link 42, and hence the lower door 3 and the upper door 2, from rotating rapidly. The lower door 3 and the upper door 2
When it reaches the open position, it is maintained in the open position by a detachable locking mechanism (not shown) provided between the casing 42 and the link 42.

As shown in FIG. 1, the center of rotation of the upper door 2 with respect to the cabinet 1 (the center of rotation of the hinge 5) is C ₁₂ , and the center of rotation of the upper and lower doors 2 and 3 (the center of rotation of the hinge 6). Assuming that the moving center) is C ₂₃ , the center of rotation (axis 8) between the lower door 3 and the link 42 is C ₃₄ , and the center of rotation (axis 43) of the link 42 with respect to the cabinet 1 is C ₁₄ , the lower door when closed. center _{C 13} moment for 3 of the cabinet 1, a line _{L 1} connecting the rotational center _{C 12, C 23,} the rotation center _C 14, C
₃₄ can be obtained as the intersection of the line L ₂ connecting the.
The instantaneous center C ₁₃ has been is positioned below larger than the lower door 3.

[0013] However, in the conventional horizontal Orito, when the rotation center with respect to the cabinet 1 above the door 2 and CI _1, rotation center CI ₁ is arranged on the front upper portion of the cabinet 1, the rotation center It disposed substantially directly above the C _23. As a result, when the instantaneous center of the lower door 3, CI _2,
The instant center CI ₂ is located at the intersection of the line L ₂ and the back surface of the lower door 3 or in the vicinity thereof. Subtracting the lower door 3 in the instantaneous center CI ₂ from the lower side to the front side (right side in FIG. 1), attempts to rotate in the counterclockwise direction in FIG. 1 about the center CI ₂ is lower door 3 moment, upper door It also attempts to rotate counterclockwise with respect to 2. However, as described above, the lower door 3
Cannot rotate counterclockwise with respect to the upper door 2. Therefore, the lower door 3 and the upper door 2 cannot be opened and rotated. Of course, if the upper is even slightly higher than the center CI ₂ even momentarily a lower portion of the lower door 3 can be opened rotating the lower door 3 by pulling it forward.
However, if minus the lower portion of the lower door 3, since the locations and the instant center CI ₂ drawn is approaching, it is not possible to open rotate unless pulled forward the lower door 3 with a large force.
For this reason, it is almost impossible to actually make the opening rotation.

[0014] In this regard, in the horizontal Orito A of the present invention, since the instantaneous center C ₁₃ in relation to the cabinet 1 of the lower door 3 is positioned below the lower door 3, the front side of any point of the lower door 3 in a case where the drawn also, the lower door 3 while rotating in the clockwise direction around the center C ₁₃ moment, rotates with respect to the top cover 2 clockwise. Therefore, the lower door 3 located at the closed position can be opened and rotated. Moreover, when the minus the lower door 3, center instantaneous center C ₁₃ is the moment C
An amount corresponding to from I ₂ is positioned lower, it is possible to lightly moving open times lower door 3. When the lower door 3 rotates clockwise, the upper door 2 rotates counterclockwise about the rotation center C12, that is, from the closed position to the open position.

FIG. 3 shows another embodiment of the first invention. In the horizontal folding door B of this embodiment, hinges 5 'and 6' are used instead of the hinges 5 and 6. The hinge 5 ′ is arranged such that its rotation center, that is, the rotation center C ₁₂ of the upper door 2 with respect to the cabinet 1 is located between the upper edge of the cabinet 1 and the upper door 2. Although not shown, a pair of hinge pieces of the hinge 5 ′ are fixed to the front upper end of the cabinet 1 and the rear upper end of the upper door 2 opposed thereto. On the other hand, the hinge 6 'is located at the center of rotation,
And the lower door 3 are arranged such that the center of rotation C23 thereof is located between them. Such an arrangement of the hinges 5 ', 6' is similar to a conventional horizontal folding door.

However, in this horizontal folding door B, a bracket 7 'is used in place of the bracket 7. The bracket 7 ′ has a longer horizontal length when closed than the bracket 7. Thus, the rotation center C ₃₄ of the lower door 3 and the link 42 is is positioned on the rear side of the cabinet 1 from the rotation center C ₃₄ of the horizontal Orito A is closed, the intersection of the line L ₁ and the line L ₂ , i.e. instantaneous center C ₁₃ in relation to the cabinet 1 of the lower door 3 is brought into a position below the lower end of the lower door 3. Other configurations are the same as those of the horizontal folding door A.

FIG. 4 shows an embodiment of the second invention. In the horizontal folding door C of this embodiment,
Instantaneous center C ₁₃ in relation to the cabinet 1 of the lower door 3 is, of course of a above the lower door 2 is disposed from the rotation center C _{1 2} for the cabinet 1 above the door 2 upward. Other configurations are the same as those of the horizontal folding door A.

In the horizontal folding door C thus configured,
Pulls the closed lower door 3 toward you and the lower door 3 is instantaneously centered
C₁₃Is rotated in the counterclockwise direction in FIG.
In addition, the upper door 2 is rotated center C with the rotation of the lower door 3.₁₂In
Rotates counterclockwise as a heart. At this time, the instant center C
₁₃Is the rotation center C₁₂Because it is located higher,
Upper door 2 when door 3 is rotated by a small angle α from the closed position
If β is the rotation angle of α, then α <β. Therefore,
The lower door 3 will rotate clockwise with respect to the upper door 2.
Thus, the lower door 3 and the upper door 2 can open and rotate. I
Moment, center C ₁₃Is located at the top, so
Turn the lower door 3 lightly so that the part to be pulled to the side is the lower side of the lower door 3.
Can be moved.

It should be noted that the present invention is not limited to the above embodiment, but can be changed as appropriate. For example, in the above embodiment, it crossed the line _L 1, _{L 2} from each other, but the intersection is the instantaneous center _{C 13} of the lower door 3, the respective rotation center _{C 12, C 23, C 3} 4, C _The lines L ₁ and L ₂ may be arranged in parallel by appropriately arranging the lines ₁₄ . In that case, the center C ₁₃ momentarily against the cabinet 1 of the lower door 3 is below or above the point at infinity. In this way, even if any part from the upper end to the lower end of the lower door 3 is pulled forward, the lower door 3 can be opened and rotated with the same force.

[0020]

As described above, according to the present invention, even if the lower end of the closed lower door is pulled forward, the lower door can be opened and rotated, and the lower door can be opened lightly. The effect of being able to move is obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the first invention in a closed state.

FIG. 2 is a side sectional view showing the same embodiment in an open state.

FIG. 3 is a side sectional view showing another embodiment of the first invention.

FIG. 4 is a side sectional view showing an embodiment of the second invention.

[Explanation of symbols]

A Horizontal folding door B Horizontal folding door C Horizontal folding door C ₁₃ Instantaneous center of the lower door when closed 1 Cabinet (frame) 2 Upper door 3 Lower door 42 Link 52 Hinge piece (arm)

Continuation of the front page (72) Inventor Tadashi Iijima 1-8-11 Higashikanda, Chiyoda-ku, Tokyo S Gatsune Kogyo Co., Ltd. F term (reference) 2E034 HA00 JA04 KA02

Claims (4)

[Claims] An upper door having an upper end rotatably connected to an upper end of a frame around a horizontal axis, and an upper end rotatable about a horizontal axis at a lower end of the upper door. The connected lower door, one end is rotatably connected to the skeleton about a horizontal axis, and the other end is horizontally positioned at a position lower than the turning connection of the lower door with the upper door. A pivot link rotatably connected about a central axis, wherein the upper door and the lower door are arranged in a line in a vertical direction when closed, close the front opening of the skeleton, and when opened, In the horizontal folding door which opens in the opening of the skeleton in a mountain-folded state so that the connection point of the slab is separated from the skeleton, the instantaneous center of the lower door with respect to the skeleton when the door is closed,
A horizontal folding door which is arranged below the lower door. 2. An upper door having an upper end rotatably connected to an upper end of the frame body about a horizontal axis, and an upper end rotatably connected to a lower end of the upper door about a horizontal axis. The connected lower door, one end is rotatably connected to the skeleton about a horizontal axis, and the other end is horizontally positioned at a position lower than the turning connection of the lower door with the upper door. A pivot link rotatably connected about a central axis, wherein the upper door and the lower door are arranged in a line in a vertical direction when closed, close the front opening of the skeleton, and when opened, In the horizontal folding door which opens in the opening of the skeleton in a mountain-folded state so that the connection point of the slab is separated from the skeleton, the instantaneous center of the lower door with respect to the skeleton when the door is closed,
A horizontal folding door disposed above the lower door and above the center of rotation of the upper door with the frame. 3. The horizontal folding door according to claim 1, wherein the instant center is located at infinity. 4. An end of an arm is rotatably connected about a horizontal axis to a position away from the front surface to the rear surface of the upper end of the skeleton, and the other end of the arm extending to the front of the skeleton. The horizontal part according to any one of claims 1 to 3, wherein an upper end of the upper door is rotatably connected to an upper end of the skeleton by fixing a portion to an upper end of the upper door. Orito.